> I'm looking at rebuilding the controller from scratch.  It raises new
> problems though.  The only resistors in the output circuits are between 
> the
> pic and the to-92 package with a house number (transistor base?).  Given
> that, I would assume the LED strips have the resistors in them, but 
> they're
> glued shut in a way that I can't open without causing a lot of damage.


Simply apply a fixed voltage to the strip through two different resistances 
and measure the current in each case. You can now solve two simultaneous 
equations and determine the Vf of the LEDs and the Rseries, if there is one.

You will have some error in this computation because Vf is not a constant 
(it increases a bit with increased current), but you should be able to learn 
a lot.

Bob Ammerman
RAm Systems

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